<!DOCTYPE html>
<meta charset=utf-8>
<title>text field selection</title>
<link rel="author" title="Denis Ah-Kang" href="mailto:denis@w3.org">
<link rel=help href="https://html.spec.whatwg.org/multipage/#textFieldSelection">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
  var nonApplicableTypes = ["hidden", "email", "datetime-local", "date", "month", "week", "time", "number", "range", "color", "checkbox", "radio", "file", "submit", "image", "reset", "button"];
  var applicableTypes = ["text", "search", "tel", "url", "password", "aninvalidtype", null];

  nonApplicableTypes.forEach(function(type){
    var el = document.createElement("input");
    el.type = type;

    if (el.type != type) {
      // Type is not supported - don't bother with the following checks.
      return;
    }

    test(() => {
      assert_equals(el.selectionStart, null);
    }, `selectionStart on an input[type=${type}] returns null`);

    test(() => {
      assert_equals(el.selectionEnd, null);
    }, `selectionEnd on an input[type=${type}] returns null`);

    test(() => {
      assert_equals(el.selectionDirection, null);
    }, `selectionDirection on an input[type=${type}] returns null`);

    test(() => {
      assert_throws_dom("InvalidStateError", function(){
        el.selectionStart = 0;
      });
    }, `assigning selectionStart on an input[type=${type}] throws InvalidStateError`);

    test(() => {
      assert_throws_dom("InvalidStateError", function(){
        el.selectionEnd = 0;
      });
    }, `assigning selectionEnd on an input[type=${type}] throws InvalidStateError`);

    test(() => {
      assert_throws_dom("InvalidStateError", function(){
        el.selectionDirection = 'none';
      });
    }, `assigning selectionDirection on an input[type=${type}] throws InvalidStateError`);

    test(() => {
      assert_throws_dom("InvalidStateError", function(){
        el.setRangeText("foobar");
      });
    }, `setRangeText on an input[type=${type}] throws InvalidStateError`);

    test(() => {
      assert_throws_dom("InvalidStateError", function(){
        el.setSelectionRange(0, 1);
      });
    }, `setSelectionRange on an input[type=${type}] throws InvalidStateError`);
  });

  applicableTypes.forEach(function(type) {
    const el = document.createElement("input");
    if (type) {
      el.type = type;
    }
    const initialDirection = el.selectionDirection;

    test(() => {
      assert_equals(el.selectionStart, 0);
    }, `selectionStart on an input[type=${type}] returns a value`);

    test(() => {
      assert_equals(el.selectionEnd, 0);
    }, `selectionEnd on an input[type=${type}] returns a value`);

    test(() => {
      assert_in_array(el.selectionDirection, ["forward", "none"]);
    }, `selectionDirection on an input[type=${type}] returns a value`);

    test(() => {
      el.selectionDirection = "none";
      assert_equals(el.selectionDirection, initialDirection);
    }, `assigning selectionDirection "none" on an input[type=${type}] should give the initial direction`);

    test(() => {
      el.selectionStart = 1;
    }, `assigning selectionStart on an input[type=${type}] doesn't throw an exception`);

    test(() => {
      el.selectionEnd = 1;
    }, `assigning selectionEnd on an input[type=${type}] doesn't throw an exception`);

    test(() => {
      el.selectionDirection = "forward";
    }, `assigning selectionDirection on an input[type=${type}] doesn't throw an exception`);

    test(() => {
      el.setRangeText("foobar");
    }, `setRangeText on an input[type=${type}] doesn't throw an exception`);

    test(() => {
      el.setSelectionRange(0, 1);
    }, `setSelectionRange on an input[type=${type}] doesn't throw an exception`);
  });
</script>
